Android Scaffold

Api Doc 基于

• Navigation组件
• Kotlin协程
• Hilt

1.导航并返回结果

package simple

class TestFragment : Fragment(), ResultSupporter<Long> by ResultSupporter() {
    init {
        initResultCaller()
    }
    fun setResultCurrentTime() {
        setResult(System.currentTimeMillis())
    }
}

nav_test.xml

<fragment android:id="@+id/testFragment"
    android:name="simple.TestFragment" 
    android:label="Test" />

CallFragment

fun getTestTime() {
    lifecycleScope.launch {
        val time =
            findGuardNavController().navigateForResult<Long>(R.id.testFragment) ?: return@launch
        println("get from test time -> $time")
    }
}

1. 导航前验证权限

例如需要Camera权限 nav_test.xml

<fragment android:id="@+id/testFragment" 
    android:name="simple.TestFragment" 
    android:label="Test" >
    <argument
        android:name="permissions"
        app:argType="string"
        android:defaultValue="android.permission.CAMERA" />
</fragment>

fun getTestTime() {
    lifecycleScope.launch {
        //同时会验证权限
        val time =
            findGuardNavController().navigateForResult<Long>(R.id.testFragment) ?: return@launch
        println("get from test time -> $time")
    }
}

//启动并不验证权限

fun launchTest(){
    findGuardNavController().navigate(R.id.testFragment)
}